• 한국해양공학회지
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• 제11권2호
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• pp.122-130
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• 1997

Coastal diaster induced by waves and countermeasures were investigated in the viewpoint of reduction of overtopping rate with enviroment in fishing port. The reduction method of wave overtopping rate using ecosystem control structures was proposed and studied on the efficiency by hydraulic and numerical experiments. The estimation models on wave overtopping rate was proposed after comparing previous models with dimensional analysis and experimental results. Control function o fwave overtopping by use of ecosystem controlstructures was simulated and discussed with combining wave shoaling-dissipation-breaking deformation model around ecosystem control structures and newly proposed calculation model for wave overtopping rate. Feasiblilty of ecosystem control structures could be confirmed for reduction of wave overtopping and fisheries-based multipurpose development of coastal zone.

• 수산해양기술연구
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• 제42권4호
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• pp.240-258
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• 2006

The potential of ecosystem-based fisheries management is recently recognized to be very important to improve the sustainability of fisheries resources. Under the depressed condition of many fisheries resources, this recognition has been expanded and more effort has been taken to improve this approach. Taking ecosystem concept includes the use of other tools of management in addition to fisheries regulation, such as stock and productivity enhancement, provision of physical structure, or marine protected areas. In the ecosystem-based fisheries management approach, it would require to holistically consider ecological interactions of target species with predators, competitors, and prey species, the effects of climate on fisheries ecology, the complex interactions between fishes and their habitat, and the effects of fishing on fish stocks and their ecosystem. Fisheries management based upon the understanding of these factors can prevent significant and potentially irreversible changes in marine ecosystems caused by fishing. A useful approach for analyzing tropho-dynamic interactions and mass-balance in marine ecosystems is introduced to demonstrate the complexity and usefulness of the ecosystem approach, which was applied to a small ecosystem in Korea. Korea should seriously consider to take the ecosystem-based approach to fisheries management, since most major fish stocks are currently depleted due to many reasons such as overfishing, land reclamation and coastal pollution.

• 수산해양교육연구
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• 제26권6호
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• pp.1185-1192
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• 2014

Health assessment of aquatic ecosystem was investigated by using LEHA (Lentic Ecosystem Health Assessment) model method with habitat fish population structure analysis in this study. The investigation was two comparison spots (St 1; floating island, St 2; 500 m away site from st 1) in the Habcheon lake of Korea. As results, health evaluation of Habcheon lake ecosystem was fair grade of LEHA scores base on metric values in both place (30 score in st. 1 and 32 score in st. 2).

• 환경정책연구
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• 제12권2호
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• pp.3-16
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• 2013

보편 일률적으로 적용가능한 생태계서비스 정의 및 분류체계는 이상적이기는 하나 현실, 특히 의사결정지원에는 한계가 있다. 본 소고는 생태계서비스 개념과 분류체계의 발전과정 검토를 통하여 문헌상의 용어를 비교 분석하고 최근 연구동향을 반영하여 생태계서비스와 편익의 개념을 재정립하였다. 또한 '정책목표에 기반을 둔 복수의 생태계서비스 정의와 분류체계가 필요하다'는 전제하에 환경계정, 환경가치추정, 자연자원관리와 같은 특정 정책목표에 따라 생태계서비스의 정의와 범위를 차별화하여 제시하였다. 특히 의사결정지원을 위해서는 정책목표 달성을 위한 최종생산물의 확인, 목록화, 역방향 경로분석(편익-서비스-기능-구조/과정)의 필요성을 제시하고 그 유용성을 예시하였다.

• 한국인터넷방송통신학회논문지
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• 제15권2호
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• pp.245-254
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• 2015

본 연구의 목적은 창업활성화를 성공적으로 유도하기 위해 필요한 요소로서 창업순환 구조를 연구하고 이를 유지하기 위한 필수조건을 도출하는 데에 있다. 따라서 기업생태계를 기반으로 창업순환구조를 설계한 후 이를 검증하기 위해 미국의 실리콘밸리와 영국의 테크시티(Tech city)에 대하여 논의하였다. 창업순환구조를 유지하기 위한 필수요소는 다음과 같이 정리하였다. 첫째, 목적에 따라 구성요소 간의 공유의 장이 형성되어야 한다. 둘째, 우수한 인력이 기반 되어야 한다, 셋째, 선순환구조에서 수익을 창출하는 소비자 집단이 많이 형성되어야 한다. 넷째, 타 지역간 연계 네트워크를 확보해야한다. 다섯째, 정부 및 제도적 지원을 통해 쉽게 창업할 수 있는 환경을 만들어 생산자의 진입이 용이해야 한다. 마지막으로 자립형 생산자들의 기업가정신이 함양되어야 한다. 향후 연구는 기업 생태계를 기반으로 한 여러 국가의 사례를 바탕으로 각 사례의 공통점과 차이점에 대해 비교 분석하는 방향으로 나아갈 필요가 있다.

• The Korean Journal of Ecology
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• 제20권1호
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• pp.69-78
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• 1997

The development of stream ecology, especially the progress of that field in North America, has been briefly reviewed, and stream studies in Korea were analyzed through literature survey. During the last two decades, theoretical advances in stream ecology and understanding of the structure and function of stream ecosystem were made from the studies mainly in North America. Early studies (1960-1970) focused on determination of the environmental factors controlling the distribution and abundance of organisms dwelling in streams. Introduction of conceptual development, such as the functional feeding concept, river continuum concept, and nutrient spiraling was notable in the late 70's and the 80's. For last 20 years, experimentation approaches to apply ecological principles were very fruitful in the understanding of community structure. Even though studies on the stream ecosystem is Korea have a long history, most of works were concentrated on limited subjects: water quality, abundance and distribution of aquatic insects and fishes. Basic ecological attributes of stream organi는 and test of ecological principles have rarely been a subject of research topics. We must concentrate our effort to enhance our understanding of stream and river ecosystem through qualitative, experimental and interdisciplinary approaches.

• 대한산업공학회지
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• 제42권2호
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• pp.138-150
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• 2016

This study aims to analyze the structure and characteristics of the domestic online game industry using network analysis. In particular, two-mode network analysis is employed to measure the network structure, centrality, and cluster for two types of online game platforms, online games and mobile games, from 1996 to 2014. We also conduct a dynamic analysis to capture the structural changes in the ecosystem by internal and external environmental changes before and after turning point for each online game platform. It is revealed that the online game econsystem has the higher number of clusters and higher concentration ratio than those of mobile game ecosystem. In dynamic analysis, both platforms exhibit similar trends over time with the increasing number of clusters, enlargement of largest cluster's size, and decreasing concentration ratio. This study is expected to provide fruitful implications for strategic decision making of online game companies and policy making for the online game industry.

• 한국인터넷방송통신학회논문지
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• 제18권2호
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• pp.1-9
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• 2018

본 연구는 생태계 측면으로 블록체인 기술을 논의하고 각 구성 요소의 역할에 대하여 조사하였다. 본 연구에서 블록체인 생태계는 구성원이 분산 원장을 기반으로 새로운 가치(서비스)를 창출하기 위해 서로 공유하고 협업하는 네트워크 구조이다. 따라서 식물생태계와 비교하면, 블록체인 생태계의 구성 요소는 서비스 제공 업체(생산자), 서비스 사용자(소비자) 및 분산 원장 소유자(분해자)로 구성된다. 블록체인 생태계에서 분해자 역할을 하는 분산 원장은 중요한 요소이다. 블록체인 생태계의 가치를 유지하고 활성화하기 위해 분산 원장 소유자가 효율성을 확보 할 수 있는 환경을 구축하여야 생태계가 활성화 될 수 있다. 본 연구는 블록체인 생태계의 내부 관계를 이해하고 관련 연구에 기여할 뿐만 아니라 생태계를 활성화시키는 데 도움이 될 것이다. 본 연구의 한계는 탐구적인 연구를 기반으로 작성한 것이며, 향후에는 객관적인 자료를 기반으로 관련 논의가 되어야 한다.

• World Technopolis Review
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• 제5권1호
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• pp.2-18
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• 2016

The development of Technopolis and the establishment of innovative ecosystem have made an important contribution in South Korea's latest industrial development and economic growth. Particularly, Daedeok INNOPOLIS which is responsible for the central role in the national science technology advancement was founded as the Science Town in the 1970s. Since then, it has undergone three-phases of development: Science Park, Technopolis and Innovation cluster. As the result of the transition, Daedeok INNOPOLIS currently serve as the leading role for achieving sustainable economic growth, employment promotion, national and regional innovation. In order to accelerate the progress for success, Daedeok INNOPOLIS have arranged an opportunity for 21st century new industry development, improved growth of technology-intensive SMEs, reinforced academic-industrial cooperation, and established innovative ecosystem. Daedeok INNOPOLIS is considered as an outstanding case of endogenous development strategy of Technopolis. This study attempts to consider the endogenous development strategy of Technopolis in Korea through the analysis of development characteristics of Daedeok INNOPOLIS in two different perspectives: changes of spatial structure and establishment of innovation ecosystem. Daedeok INNOPOLIS have experienced a series of endogenous growth that is consisted of advancement strategy and structural changes, which allowed Daedeok research town to grow into an innovative cluster. A sign of growth of Daedeok INNOPOLIS became apparent when its strategy to reinforce the academic-industry cooperation system by promoting participation from universities helped to overcome a functional limitation as a research institute integrated for the establishment of innovative ecosystem. Since then, the center for creative economy and innovation established in cooperation with large enterprise, has a role to build a startup ecosystem and to promote next level of development such as proactive fostering of venture companies for sustainable technopolis development.

• 한국수산과학회지
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• 제36권4호
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• pp.389-401
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• 2003

The changes in structure and abundance of taxon or species groups in the East Sea ecosystem were compared between pre- and post-Climatic Regime Shift (CRS) occurred in the mid 1970s using an ECOPATH model. Although the East Sea ecosystem consisted of primary producers, primary consumers, secondary consumers and terminal consumers most species groups were classified as secondary consumers. The mean trophic level between pre- and post-CRS increased from 3.09 during the pre-CRS period to 3.28 during the post-CRS period. Total biomass of the species groups in the East Sea ecosystem increased by $9\%$ due to the CRS, and total catch increased by $48\%.$ The most significant differences between pre- and post-CRS models occurred at the mid/high trophic levels occupied by fishes and cephalopods. Relative contribution of the different species groups to the total energy flow was calculated for the trophic level III. As a result, the status by the dominant species in the East Sea ecosystem shifted from cephalopods to walleye pollock due to the CRS. Relative contribution of 5 species, which were commercially important, such as Pacific saury, Pacific sardine, filefish, walleye pollock and sandfish in trophic level III, were also changed due to the CRS. Finally, the CRS turned out to cause large variations in biomass and catch of fisheries resources as well as the status and role of the major species.